WAR MASTER-class Mjolnir
From Halopedia, the Halo wiki
The visor is contoured to intimidate enemies. The helmet has a R-42 case-filter rebreather. The suit has a shield recoupler (Corsica-102) that improves armor resiliency, with the reactor pack including a plane-reactor coupling that increases mobility through weight distribution.
The suit also is resilient like other heavy variants of Mjolnir, with the speed of the light variants. It also includes a full communication suite, networked sensors, and remote deployment componentry.
The War Master variant is manufactured by Lethbridge Industrial. It is Lethbridge Industrial's most popular and most exotic armor system. It was tested at the Lethbridge Combat Fields. War Master-class armor is a multi-use, multi-functional configuration, which, when utilized properly, can benefit the user in almost any combat scenario propagated on the battlefield.
The WAR MASTER's neural interface was intentionally throttled after early testing showed inexperienced Spartans would dangerously overextend themselves in combat due to the euphoric side-effects.
Fear around the overextended performance specs has abated since the suit hit the field.
Halo 5: Guardians
Available skins: Augustan, Scipio, and Tiberian
In Halo 5: Guardians due to the "Body" having a predefined customisation this armor set permanently has the following parts from Halo 4:
Halo 4 skins
Halo 5: Guardians skins
List of appearances